package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

/**
 * 处理文件上传下载
 */
@RestController
@RequestMapping("common")
public class CommonController {
    @Value("${reggie.path}")
    private String BasePath;
    @PostMapping("upload")
    public R<String> upload(MultipartFile file) throws IOException {
        File file1 = new File(BasePath);
        if (!file1.exists())
        {
            file1.mkdirs();
        }
        String originalFilename = file.getOriginalFilename();
        String prx = originalFilename.substring(originalFilename.lastIndexOf("."));
        String uuid = UUID.randomUUID().toString();
        String FileName=uuid+prx;
        file.transferTo(new File(BasePath+FileName));
        return R.success(FileName);
    }
    @GetMapping("download")
    public void download(String name, HttpServletResponse response) throws Exception {
        FileInputStream inputStream = new FileInputStream(BasePath + name);
        ServletOutputStream outputStream = response.getOutputStream();
        byte[] bytes=new byte[1024];
        int len;
        while ((len=inputStream.read(bytes))!=-1){
            outputStream.write(bytes,0,len);
        }
    }



}
